Home / 2,947.94-4,420.14-1,388.30

Finding the Fourth Proportional to 2,947.94, 4,420.14 and 1,388.30

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Solution

The fourth proportional to 2,947.94, 4,420.14 and 1,388.30 is: 2,081.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.94 : 4,420.14 = 1,388.30 : x
  2. Step 2: Convert to fraction form
    2,947.94/4,420.14 = 1,388.30/x
  3. Step 3: Cross multiply
    2,947.94x = 4,420.14 × 1,388.30
  4. Step 4: Simplify right side
    2,947.94x = 6,136,480.36
  5. Step 5: Solve for x
    x = 6,136,480.36/2,947.94
  6. Step 6: Final answer
    x = 2,081.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.